Process of coating the valves, cylinders, &amp;c., of gas-engines and the like.



. fast as it should UNITED I STATES PATENT OFFICE.

JOHN E. SMITH, OF SEATTLE, WASHINGTON, ASSIGNOR OF ONE-HALF TO CATHERINEM. HEMEN, 0F SEATTLE, WASHINGTON, AND ONE-FOURTH T0 HENRY B. BURKHART,OE SEATTLE, WASHINGTON.

PROCESS OF COATING THE VALVES, CYLINDERS, &c., OF GAS-ENGINES AND THELIKE.

Patented Jan. 28, 1919.

Application filed December 14, 1915. Serial No. 66,751.

1,292,903 Specification of Letters Patent.

No Drawing.

forms in the presence of water, a double chlorld of zinc and ammoniawhich has a Well known action of cleaning and bri htenm To all whom itmay concern:

Be it known that I, JOHN F. SMITH, a

citizen of the United States, and a resident of Seattle, in the countyof King and State of'Wa'shington, have invented certain new and usefulImprovements in Processes of Coating the Valves, Cylinders, &c., of Gas-Engines and the like, of which the following is a specification.

My invention relates to the process of coating the valves and inside ofthe cylinders of a gas engine with a thin and smooth metallic skin orcoating for the purpose of filling pit holes and inequalities in thesurfaces of the metal; for the purpose of resizing the piston, cylindersand valves; and for the purpose of removing and preventing theincrustation of carbon on the cylinder, piston, etc., and preventlodgment of another coat of carbon. The metallic coating is applied inmy process while the engine is running and therein difiers from theusual plating and spraying processes. My process consists of mixing zincoxid and sal ammoniac in the proportions of about two ounces of theformer and one ounce of the latter a small quantity of Venetian red,one-third ounce of aqua ammonia and one gallon of water. above mixtureis agitated and placed in a large spouted squirt can or the like. theengine is started rather slowly and after becoming warmed up, the spoutof the can is inserted in the auxiliary air-valve on the engine. Themixture may by squirting, after which the suction of the engine willdraw it from the can sufliciently be admitted to the engine slowly. Itis believed that the action of the zinc and sal ammoniac (ammoniumehlorid) The zinc oxid, one ounce be started flowing metal. The chemicalaction of depositing ant the composition of the deposit on the walls ofthe cylinder, etc., is not well understood as the action of sal ammoniacin the presence of metals varies greatly under different conditions. Theadvantages of coating the cylinder, piston, valves. etc., of an engineby this simple process, will be apparent when it is understood that thecoat compensates for wear. 1s smooth and bright, reslsts the depositingof carbon, and takes up inequalities in the surfaces, and causes theengine to pick up and give more power than previous to application dueto removing friction.

'hat I claim is- 1. The process of cleaning the cylinder, valves andpiston of an internal combustion engine by the slow introduction of amixture. of sal ammoniac, zine oxid and water into said cylinder whilethe engine is running.

2. The process of cleaning and coating the combustion chamber, valves,piston. etc. of an internal combustion engine by the slow introductionof a mixture of two ounces sal'ammoniac. one-third ounce ammonia and onegallon of water, into the said combustion chamber auxiliary air valve ofsaid engine while said engine is running.

3. A composition of matter suitable for removing carbon from enginecylinders and parts thereof. said compo.'tion comprising about two partsof zinc oxid. about one part sal ammoniac and about 128 parts of water,substantially as describjeg.

HN F. SMITH.

through the

